Mitel 3300 Technician's Handbook page 269

Table 38: BRI Connector Pinout (Amphenol 25-pin)
Pin Signal
1 T1
2 T2
3 T3
4 T4
5 T5
6 T6
7 T7
8 T8
9 T9
10 T10
BRI NSU DIP Switch Settings
Table 39 below shows the settings for the CEPT port DIP switch for the
BRI NSU.
Table 39: CEPT Mode - E1 Port DIP Switch Settings
Switch Use
1 Tx Ground
2 Rx Ground
Note: This setting is site-dependent. Normally Tx is grounded and Rx is not
grounded, but that depends on which remote connection is grounded. These
switches are used only with the coaxial adapter; leave up (floating) with twisted
pair connection. Not required for RJ-45 connector.
Pin Signal
11
12
13
14
15
26
27
28
29
30
Setting Notes
Up: Floating Not required for RJ-45 connector.
Down: Ground
Up: Floating Not required for RJ-45 connector
Down: Ground
Hardware Reference
Pin
T11 31
T12 32
T13 33
T14 34
T15 35
R1 36
R2 37
R3 38
R4 39
R5 40
Signal
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
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